Added a Converter to get a LeftMargin for TreeView
Added a TreeView Metro style
Ahm yeah...github and stuff
Revert "Ahm yeah...github and stuff"

This reverts commit 7c0c3af7a8c4d993917af2ec2cbf035473baa2cf.
Merge pull request #1 from MahApps/master

Merge MahApps master
Added MetroTreeView and fixed #640
Deleted old Converter
Added Description for TreeView to Demo
Merge pull request #642 from stefan-schweiger/MetroTreeView

Added a MetroTreeView and fixed #640